1385843827 has 4 divisors (see below), whose sum is σ = 1389559600. Its totient is φ = 1382128056.

The previous prime is 1385843821. The next prime is 1385843839. The reversal of 1385843827 is 7283485831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1385843827 - 2³ = 1385843819 is a prime.

It is a super-2 number, since 2×1385843827² = 3841126225668011858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1385843821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1857327 + ... + 1858072.

It is an arithmetic number, because the mean of its divisors is an integer number (347389900).

Almost surely, 2^1385843827 is an apocalyptic number.

1385843827 is a deficient number, since it is larger than the sum of its proper divisors (3715773).

1385843827 is an equidigital number, since it uses as much as digits as its factorization.

1385843827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3715772.

The product of its digits is 1290240, while the sum is 49.

The square root of 1385843827 is about 37226.9234157216. The cubic root of 1385843827 is about 1114.9056009419.

The spelling of 1385843827 in words is "one billion, three hundred eighty-five million, eight hundred forty-three thousand, eight hundred twenty-seven".